Electrical system of distribution



M. R. SHEDD.

ELECTRICAL SYSTEM OF DISTRIBUTION.

APPLICATION FILED NOV.23, 19l5.

1,372,096, Patented Mar. 22, 1921.

' 1 VENTOR h ATTORNEYS UNITED STATES PATENT 2' OFFICE.

MARCELLUS R. SHEDD, OF LANCASTER, NEW YORK, ASSIGNOR TO GOULD COUPLERCOMPANY, A CORPORATION OF NEW YORK.

ELECTRICAL SYSTEM OF DISTRIBUTION.

Specification of Letters Patent.

Patented Mar. 22, 1921.

Application filed November-'23, 1915. Serial No. 63,011.

To all whom it may concern:

Be it known that I, MARGELLUS R. SHEDD, a citizen of the United States,and a resident of Lancaster, county of Erie, State of New York, haveinvented certain new and useful Improvements in Electrical Systems ofDistribution, of which the following is a specification.

My invention relates to electrical systems of distribution and moreparticularly to improved generator regulation in such systems, where astore e battery is charged by the generator. hile useful in othersituations my invention is especially applicable in car lightingsystems, where the generator is drlven at variable speed, as

i by the car axle. The main object of the invention is to provideimproved regulation of the carbon pile type. Further and more specificobjects, features and advantages will more' clearly appear from thedetail description given'below, taken in connection with theaccompanying sheet of drawings, which forms a part of this-specification.

In the drawings Figure 1 illustrates diagrammatically a system embodyingmy improvements in one form, and Fig. 2 is a similar diagram,illustrating a. modified form of system.

Referring to Fig. 1, 1 represents a generator having a shunt fieldwinding 2. 3 represents a storage battery adapted to be connected to thegenerator 1, to be charged thereby, by the main switch 4, which may beof any suitable form A lamp circuit 5 is shown connected across thebattery through a switch 6. Serially connected between the battery andlamps is a carbon pile 7 the resistance of which is adapted to be variedby a lever 8, controlled by a solenoidv 9 connected across the lampcircuit, so that it controls the carbon pile 7 to maintain the voltageon the lamps sub- 15, and also witha pin 16 operating in a slot 17 inthe end of the long arm of the lever 11. Adapted to bear upon the knifeedge 15 is a member 18 apertured at each current exceeding the desiredlimit.

end and through which apertures rods 19 and 20 pass respectively. Therod 19 has a core 21 of a solenoid 22 connected to its lower end, thesolenoid coil 22 being connected in the generator circuit between thegenerator and battery, so as to be responsive to generator currentvariations. The rod 19 is provided with a pin 23, so that when thesolenoid 22 raises the core 21 from its seat, the pin 23 moves member 18upwardly, which causes the long arms of both levers 11 and 13 to moveupwardly, they being connected together by the pin and slot connection16, 17. This causes the resistance of the pile to be increased from bothends, thereby making the device more sensitive in regulating thegenerator by variation of the resistance of the pile. The other end ofthe member 18 is similarly adapted to rest on a pin 24, secured to therod 20. The rod 20 has connected to its lower end a core 25, adapted tobe raised from its seat by a solenoid 26, whose coil is connected acrossthe generator to be responsive to voltage variations across thegenerator and battery.

In operation the generator when running at sufficient speed will chargethe battery and supply the lights. If the current tends to becomeexcessive, the coil 22 will raise the core 21, which will raise theright hand end of member 18. This raises the knife edge 15 on the lever13, and consequently the long arms of both levers 11 and 13-are raised,thus quickly increasing the resistance in the generator field anddecreasing the generator voltage, so as to prevent the As the batterybecomes charged, its voltage rises and when the voltage has reached thedesired value, either that of a substantially fully charged battery orany lesser value, the coil 26 raises its core and causes the other endof member 18 to be raised, thereby tending to increase the resistance ofpile 10 and further weaken the generator. This causes it to deliver lesscurrent so that coil 22 is no longer able to sustain its core 21, whichdrops down against its seat. The voltage coil 26, however, continues toact to prevent the generator voltage going materially higher, so thatthe charging of the battery is tapered off and serious overchargingprevented.

The arrangement shown in Fig. 2 is the same, except that the coil 22 isshown connected in the battery circuit, so that it is responsive only tobattery current chan es instead of total generator output, as in %ig. 1.

Various modifications and changes may be made without departing from thespirit and scope of the invention. For instance,

' instead of using. a carbon pile composed of a plurality of carbondisks, any other suitable medlum may be used whose resistance varieswlth variations in pressure thereon.

In a copending application filed by me Serial No. 63012, filed November23, 1915; I have disclosed the generator regulator herein disclosed andhave made claims to it as a regulator, the present application beingconfined as to its claims to the elec- I trical system herein shown anddescribed.

having in combination a improvements, what I said pile, a coilseriallyconnected betweenthe generator and battery, means whereby said 0011 actsupon said member to actuate said levers, a coil responsive to voltage,

variations and means whereby said last mentioned coil acts upon saidmember to actuate both of said levers.

2. An electrical system of distribution generator, a storage batteryconnected to be charged thereby, a

carbon pile regulating the generator, a member acting on one end of saidpile, a member acting on the other end of said pile, and

means comprising a coil responsive to varia-t tions in current flowingfrom the generator to the battery, for causing the actuation of both ofsaid members to vary the resistance of said pile and a voltage coil forcausing the actuation of both of said members to vary the resistance ofsaid pile.

3. An electrical system of distribution having in combination agenerator, a storage battery connected to be charged thereby,

. a carbonpile regulatingthe generator, two

members acting on said pile to vary the vr'e- I sistance thereof, andmeans comprising a coil responsive to variations in currentflowing from,the generator tothe battery, for

causing the actuation of both of said mem.

bers to-vary the resistance of said pile and a voltage-coil'for causingthe actuation of both of said members to vary: the resistance of saidpile.

4. electrical, system of distribution having in combination a generator,a storage battery connected to be charged thereby, a carbon pileregulating the generator, two

levers acting on said pile to vary the resistance thereof, a memberadapted to actuate both of said levers simultaneously, a coil seriallyconnected between the battery and generator, adapted to move said vmember when the current therein reaches a predetermined value, a voltagecoil adapted to move said member when the voltage thereacross agebattery connected to be charged thereby,

a carbon pile regulating the generator, a

lever operating on one end of said pile, a.

lever operating on the other end of said pile, means whereby movement ofone lever causes movementof the other lever, anda member having avoltage controlled magnet operating on one end thereof, and a currentcontrolled magnet operating on the other end thereof, saidmember beingadapted to actuate both of said levers when operated by either of saidma ets.

6. An electrica system of distribution having in-combination agenerator, a storage battery connected to be charged thereby, a carbonpile regulating the generator, a lever operating on one end ,of saidpile, a lever operating on the other end of said pile, means wherebymovement of one.lever causes movement of the other lever, a member,movement of either end of which is adapted to actuate both of saidlevers, a current controlled solenoid having a movable core for movingone end of said member and a voltage solenoid having a movable core formovin the other end of said member.

7. An efiectrical system having in combination a generator, a storagebattery connected to be charged thereby, a carbon pile regulating thegenerator field strength,

-mechanism operating said pile to vary its resistance, an electromagnetresponsive to voltage changes of the system, a current'responslveelectromagnet' connected between the generator and battery, separatelymovable armatures forsaid electromagnets, each of said armatures uponbeing sufliciently attracted by its electromagnet, bein' adaptedto'cause the actuation of said mec anism to vary the resistance of saidpile at-both ends thereof" without movement of the other armature.

' In testimony whereof I have signed my name to this specification.

MARoELLUs SHEDD,

